Fifty six post offices are still without power throughout Kentucky. And three are still closed. That’s down from nearly a dozen offices closed earlier this week, and well over a hundred without power. But mail service is slowly returning in the Commonwealth. Still, postal service spokesman David Walton says some offices have fallen behind.“There is mail that has backed up at some offices, just about a day or two, and we hope to have that delivered as soon as we can," says Walton.Walton says some streets have been declared too dangerous to enter, and so homes on those streets will have to wait until it’s safe for letter carriers to return. He says the postal service is working around the clock to return delivery to normal.